Okay... not really a question more a statement...
Just wired a 1 Farad Audio cap in parallel with my dying battery... And now my car starts.... second crank everytime... Starting it used to range from one crank to many seconds cranking to deader than a door knob...
Oh and as a side benefit (although I think it's all in my head) it appears to have made the car run better... possibly due to aging/dying ignition system...